<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">商品管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 头部警告区域 -->
      <el-alert
        title="注意:只允许为第三级分类设置相关参数!"
        type="warning"
        effect="dark"
        :closable="false"
        show-icon
      >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类:</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            v-model="selectedCatKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <!-- 添加参数的按钮 -->
          <el-button
            type="primary"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template v-slot="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag
                  v-for="(item, index) in scope.row.attr_vals"
                  :key="index"
                  closable
                  @close="handleClose(index, scope.row)"
                  >{{ item }}</el-tag
                >
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template v-slot="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="delParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <!-- 添加属性的按钮 -->
          <el-button
            type="primary"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template v-slot="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag
                  v-for="(item, index) in scope.row.attr_vals"
                  :key="index"
                  closable
                  @close="handleClose(index, scope.row)"
                  >{{ item }}</el-tag
                >
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template v-slot="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="delParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数的对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="30%"
      @close="addDialogClosed"
    >
      <!-- 添加参数的表单 -->
      <el-form
        ref="addFormRef"
        :rules="addFormRules"
        :model="addForm"
        label-width="80px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数的对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="30%"
      @close="editDialogClosed"
    >
      <!-- 添加参数的表单 -->
      <el-form
        ref="editFormRef"
        :rules="editFormRules"
        :model="editForm"
        label-width="80px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import {
  getGoodsCateAPI,
  getSelListAPI,
  addParamsAPI,
  chkParamsAPI,
  subEditParamsAPI,
  delParamsAPI,
} from '@/api'
export default {
  data() {
    return {
      cateList: [],
      //级联选择框的配置对象
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      //联选择框双向绑定到的数组
      selectedCatKeys: [],
      //   被激活的页签的名称
      activeName: 'many',
      // 动态参数的数据
      manyTableData: [],
      // 静态属性的数据
      onlyTableData: [],
      // 控制添加对话框的显示与隐藏
      addDialogVisible: false,
      // 添加参数的表单数据对象
      addForm: {},
      // 添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },
      // 控制修改参数对话框的显示与隐藏
      editDialogVisible: false,
      // 修改的表单数据对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },
      // 保存编辑事件的提交id
      editId: 0,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获得分类列表
    async getCateList() {
      const { data: res } = await getGoodsCateAPI({ type: 3 })
      if (res.meta.status !== 200)
        return this.$message.error('获取分类列表失败!')
      this.cateList = res.data
      //   console.log(this.cateList)
    },
    // 级联选择框选中项变化,会触发这个函数
    handleChange() {
      this.getParamsData()
    },
    // tab页签点击事件的处理函数
    handleClick() {
      this.getParamsData()
      // console.log(this.activeName)
    },
    // 获取参数列表数据
    async getParamsData() {
      //   console.log(this.selectedCatKeys)
      //   证明选中的不是三级分类
      if (this.selectedCatKeys.length !== 3)
        return (
          (this.selectedCatKeys = []),
          (this.manyTableData = []),
          (this.onlyTableData = [])
        )
      //   证明选中的是三级分类
      // console.log(this.activeName)
      const { data: res } = await getSelListAPI(this.cateId, {
        sel: this.activeName,
      })
      // console.log(res)
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })
      // console.log(res.data)
      if (res.meta.status !== 200)
        return this.$message.error('获取参数列表失败！')
      if (this.activeName === 'many') this.manyTableData = res.data
      else this.onlyTableData = res.data
    },
    // 监听对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击确定按钮添加参数并提交
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await addParamsAPI(this.cateId, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName,
        })
        // console.log(res)
        if (res.meta.status !== 201)
          return this.$message.error('添加参数失败！')
        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 点击按钮，展示修改的对话框
    async showEditDialog(id) {
      // console.log(this.cateId)
      // console.log(id)
      this.editId = id
      const { data: res } = await chkParamsAPI(this.cateId, id, {
        attr_sel: this.activeName,
      })
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error('获取参数失败！')
      this.editForm = res.data
      // console.log(this.editForm)
      this.editDialogVisible = true
    },
    // 监听修改参数对话框关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击确定按钮，修改信息并提交
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await subEditParamsAPI(this.cateId, this.editId, {
          attr_name: this.editForm.attr_name,
          attr_sel: this.activeName,
        })
        console.log(res)
        if (res.meta.status !== 200)
          return this.$message.error('更新参数失败！')
        this.$message.success('更新参数成功！')
        this.editDialogVisible = false
        this.getParamsData()
      })
    },
    // 删除按钮事件处理函数
    async delParams(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResult !== 'confirm')
        return this.$message.info('已取消删除参数！')
      const { data: res } = await delParamsAPI(this.cateId, id)
      console.log(res)
      if (res.meta.status !== 200) return this.$message.error('删除参数失败！')
      this.$message.success('删除参数成功！')
      this.getParamsData()
    },
    // 将对attr_vals的操作，保存到数据库
    async saveAttrVals(scope) {
      // 需要发起请求保存本次操作
      const { data: res } = await subEditParamsAPI(this.cateId, scope.attr_id, {
        attr_name: scope.attr_name,
        attr_sel: scope.attr_sel,
        attr_vals: scope.attr_vals.join(' '),
      })
      // console.log(res)
      if (res.meta.status !== 200)
        return this.$message.error('提交修改参数失败！')
      this.$message.success('提交修改参数成功！')
    },
    // 文本框失去焦点，或按下enter键触发事件
    handleInputConfirm(scope) {
      if (scope.inputValue.trim().length === 0) {
        scope.inputValue = ''
        scope.inputVisible = false
        return
      }
      // 如果没有return，则证明输入的内容需要做后续处理
      scope.attr_vals.push(scope.inputValue)
      scope.inputValue = ''
      scope.inputVisible = false
      // 需要发起请求保存本次操作
      this.saveAttrVals(scope)
    },
    // 点击按钮，切换文本输入框
    showInput(scope) {
      scope.inputVisible = true
      // 让文本框自动获得焦点
      // $nextTick方法的作用，就是当页面上元素被重新渲染之后，才会指定回调函数中的代码
      this.$nextTick(() => {
        this.$refs.saveTagInput.$refs.input.focus()
        // this.$refs.saveTagInput.focus()
      })
    },
    // 删除对应的参数可选项
    async handleClose(index, scope) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResult !== 'confirm')
        return this.$message.info('已取消删除参数！')
      scope.attr_vals.splice(index, 1)
      // 需要发起请求保存本次操作
      this.saveAttrVals(scope)
    },
  },
  computed: {
    // 如果按钮需要被禁用，则返回true，否则返回false
    isBtnDisabled() {
      if (this.selectedCatKeys.length !== 3) return true
      return false
    },
    // 当前选中的三级分类的id
    cateId() {
      if (this.selectedCatKeys.length === 3) return this.selectedCatKeys[2]
      return null
    },
    // 动态计算标题的文本
    titleText() {
      if (this.activeName === 'many') return '动态参数'
      return '静态属性'
    },
  },
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 5px;
}
.input-new-tag {
  width: 120px;
}
</style>